Multiple fuel burner



Nov. 21,

1950 J. 5. ZINK 1 MULTIPLE FUEL BURNER Filed Aug. -9, 1946 f 5 9' f III 777 I Q K, 1 i N I (\1 i 2:; 2:

u rr OE INVENTORI wx JOHN S. ZINK ATTO NEYS Patented Nov. 21 1950 UN-l TED STATES 'EPATEENT OFFICE,

"MULTIPLE FUELYBURN'ER I 'i v J.olin::S.'.-Zink, -'1"ulsa,:0kla. Application August 9, 1946; seriarNgcsasrs This invention relates to'zimprovementsiin burners, and more particularly to improvements in gas and/or oil burners.

The primary object of -the invention is to im- :prove burnerstructures of-the types disclosed in Patents 1,513,260; 1,715,051; 2,204,719 and 2,34- 4-',936. p

In accordance with the invention, agas burner ih'aving arspider-and provided at its center with a fpassageway for the reception o'f an on burneraor an auxiliary or pilot gas burner, is provided aiat'fits central portion with a frusto-conical'front cavity which may be an integral part of the spider or may be attached thereto. Where the cone is cast integrally with the spider, the improved contour for flow of gas or gas-air mixture to the spider arms lessens pressure drop resulting in increased primary air and improved operation of the burner. Where the cone is made separately and attached to the spider, it improves the oil burner operation.

The invention will be understood from the accompanying drawings, in which:

Fig. 1 is a front elevation of one form of the improved burner shown arranged in an opening in a furnace wall.

Fig. 2 is a longitudinal vertical sectional View of the same, taken on the line 2--2 of Fig. 1.

Referring to the embodiment of the invention illustrated in Figs. 1 and 2, 5 designates a fragment of a furnace wall having a port 6 leading to the combustion chamber (not shown) of the furnace.

A metallic mounting ring I is fixedly associated with the port and, in turn support a yoke 8 to hold a horizontall disposed gaseous fuel tube 9. The yoke may be of the type disclosed in my prior patents, some of which are mentioned above, as such a yoke permits the ready insertion or removal of the spider I0, supported by con duit 9.

An internal tube II is arranged co-axially within, and spaced from the external tube 9, to provide an annular passageway l2 through which gas or a gas-air mixture may travel to the spider. As in some of my prior patents, the spider is provided with hollow radial arms l3 and ports I4, [5, for the discharge of the gas or gasair mixture into the combustion chamber of the furnace. The chambers it of the spider communicate with the passageway 12, and in accordance with the present invention, a frustoconical wall H is arranged at the central portion of the spider and extends inwardly at its smaller end to merge with the conduit ll so as toprovide a substantially conical recess arranged "rearwardly of thefront face 18 df' the' spider. 'Such cavityor recess is designed to cooperate with i. an auxiliarwburnerl9 -:wmeh is 'inserted into the burner if through the conduit f-l -and is ievent the' burner 9 is used with-firmer the 'sother' -hand; i'f theburner "19 an auxiliary gas burner or a pilot burner, it is obvious that gas will travel to the same through the pipe 20.

It will be observed that the frusto-conical wall I! is bi-angularly shaped for the purpose of providing a cavity so that the fuel issuing from the auxiliary burner ports 3| may expand without impinging on the inner surface or surfaces of the frusto-conical wall. In other words, the frusto-conical wall portion 32 adjacent the base flares away from the axis of the conical member at a greater angle than the wall portion 33 adjacent the auxiliary burner 19. An annular flared member 34 connects the end of the fuel supply tube 9 to the spider arms I3. This flared wall 34 is substantially parallel to the wall portion 33 of the frusto-conical member to thereby reduce the resistance of the fuel supply passages and to facilitate the flow of the gaseous fuel to the hollow spider arms.

An air control means or plate 24 may be slidably mounted on the conduit 9 for controlling the introduction of air for combustion, into the port 6.

In the use of the improved burner, I have found that if the auxiliary burner 19 is arranged within the frusto-conical cavity at the smaller end of the wall H, the air which passes between the arms of the spider will flow into the mouth of the cone toward the auxiliary burner, as indicated by the arrows. Apparently, the cone inverts air flow to a point adjacent to the tip of the auxiliary burner, thus causing the latter to stay lit and the fuel therefrom to burn very steadily with a flame beginning immediately at the tip of the auxiliary burner. Furthermore, the frusto-conical wall acts to streamline the entrance to the chambers l6 so that the gaseous fuel flows more evenly through the spider before discharging through the ports 14 and I5.

While I have disclosed what I now consider, to

be a preferred embodiment of the invention in such manner that it may be readily understood wall having a base portion and an apex portion,

a conduit joining the apex portion of the frustoconical wall, said base portion of the frusto-conical wall being connected to said hollow arms, an

auxiliary burner head having ports therein spaced rearwardly of the base portion of the frusto-conical wall and substantially aligned withthe apex portion of the frusto conical wall, means eXtending through said conduit for supplying fuel to the auxiliary burner, means closin the conduit preventing air from moving through the conduit to the presence of the auxiliary burner, a fuel supply tube surrounding said conduit in spaced relation, and an annular flared portion carried by said tube surrounding the apex portion of the frusto-conical wall in spaced relation and joining said hollow arms for supplying fuel thereinto.

2. In a multiple fuel burner, a spider including hollow radially disposed arms, each of said arms having discharge ports therein, a frusto-conical wall having a base portion and an apex portion, a cylindrical conduit joining the apex portion of the frusto-conical wall and extending rearwardly therefrom, said base portion of the frusto-conical wall being connected to the hollow arms of the spider, an auxiliary burner head having ports therein substantially aligned with the apex portion of the frusto-conical wall, a pipe extending through said conduit supporting the burner head and for supplying fuel to the auxiliary burner, means closing the conduit preventing air from moving forwardly through the conduit to the auxiliary burner, a fuel supply tube surrounding said conduit in spaced relation, and an annular flared portion carried by the fuel supply tube surrounding the apex portion of the frusto-conical wall in spaced substantially parallel relationship and connected to said hollow arms for supplying fuel thereinto.

JOHN S. ZINK.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,678,086 Schrader July 24, 1928 1,844,315 Forney Feb. 9, 1932 1,922,857 Meachem Aug. 15, 1933 1,943,083 McDonald et a1 Jan. 9, 1934 2,204,719 Zink June 18, 1940 2,211,584 Baker Aug. 13, 1940 2,344,936 Zink Mar. 21, 1944 2,487,959 Zink Nov. 15, 1949 

